Description
Conveners:
- Samira Hassani (IRFU, CEA, Universitรฉ Paris-Saclay)
- Mathieu Perrin-Terrin (CPPM, Aix-Marseille Universitรฉ, CNRS/IN2P3)
- Mariangela Settimo (SUBATECH Nantes, CNRS/IN2P3)
Contact: eps-hep2025-conveners-T03-l@in2p3.fr
KM3NeT/ORCA is a water-Cherenkov neutrino telescope currently under construction at the depths of the Mediterranean Sea. Its primary goal is to study atmospheric oscillations and to determine the neutrino mass ordering. The detector consists of a three-dimensional array of strings, each equipped with 18 digital optical modules containing 31 photomultiplier tubes. At present, 24 out of the...
T2K is a neutrino experiment that measures neutrino and antineutrino oscillations using a long baseline of 295km, from the neutrino beam source at JPARC in Japan, to the Super-Kamiokande detector in Kamioka. The ND280 near detector at JPARC measures the properties of the neutrino beam prior to oscillations, while SuperK measures the beam after oscillations.
In this talk, the most recent...
The Jiangmen Underground Neutrino Observatory (JUNO) is a multipurpose neutrino experiment filled with 20k tons of liquid scintillator (LS) and equipped with more than 40000 photosensors. It is designed to observe neutrinos and anti-neutrinos from various sources such as nuclear reactors, the Earth, atmosphere, the Sun and Supernovae. The detector construction was finished in 2024. It is...
The KArlsruhe TRItium Neutrino experiment (KATRIN) is performing a high precision spectroscopy of the tritium beta spectrum becay to search for the signature of the neutrino mass. It combines a high-intensity gaseous molecular tritium source with a high-resolution electrostatic spectrometer with magnetic adiabatic collimation which allowes KATRIN to reach a sub-eV sensitivity to the neutrino...
The precise determination of the mass scale of (anti)neutrinos remains a fundamental open question in particle physics, carrying major implications ranging from sub-atomic physics to cosmological model.
The only model-independent approach to the measurement of neutrino mass is based on the analysis of the endpoint of beta or electron capture (EC) decay spectra, relying purely on kinematic...
We consider an axion flux on Earth consistent with emission from the Supernova explosion SN 1987A. Using Chiral Perturbation Theory augmented with an axion, we calculate the energy spectrum of a+NโN+ฮณ as well as a+NโN+ฯ0, where N denotes a nucleon in a water tank, such as the one planned for the Hyper-Kamiokande neutrino detection facility. Our calculations assume the most general axion-quark...
The Scattering and Neutrino Detector at LHC (SND@LHC) is a compact, standalone experiment located in the TI18 tunnel, 480 meters downstream of the ATLAS interaction point, designed to observe neutrinos produced in LHC proton-proton collisions. The SND@LHC detector allows for the identification of all three flavors of neutrino interactions in the pseudorapidity region 7.2 < ฮท < 8.4 within an...
The FASER experiment at the LHC is designed to search for light, weakly-coupled new particles, and to study high-energy neutrinos. The experiment has been running since 2022, and has collected nearly 200/fb of pp collision data. FASER has released several neutrino results including the first observation of electron and muon neutrinos at a particle collider, the first measurement of the muon...
The DsTau(NA65) experiment at CERN aimed to measure an inclusive differential cross-section of Ds production with decay to tau lepton and tau neutrino in proton-nucleus interactions. The DsTau detector is based on the nuclear emulsion technique, which provides excellent spatial resolution for detecting short-lived particles such as charmed hadrons. We present the first results from the...
We discuss Charged Lepton Flavour Violating (CLFV) signals in Inverse Seesaw (ISS) scenarios with 3+3 heavy sterile states and flavour and CP symmetries.
We distinguish between two options of these scenarios, each characterised by a different spectrum of the heavy sterile states and different forms of the couplings and mass matrices. For both options, different lepton mixing patterns are...
The XENONnT detector, located at the INFN Laboratori Nazionali del Gran Sasso in Italy, is a leading experiment in the search for dark matter in the form of Weakly Interacting Massive Particles (WIMPs). It features a dual-phase time projection chamber with a 5.9-tonne liquid xenon active target, designed to detect rare particle interactions. Owing to its low background environment, the...
The RICOCHET collaboration is currently building a neutrino observatory to measure with high precision the coherent elastic neutrino-nucleus scattering (CEฮฝNS) of low-energy (< 10 MeV) reactor antineutrinos at the Institut Laue-Langevin (ILL) in Grenoble, France. Two separate cryogenic calorimeter technologies are being developed by the collaboration: the CryoCube is an assembly of germanium...
The Deep Underground Neutrino Experiment (DUNE) is a nextโgeneration, longโbaseline and dualโsite neutrino experiment. It will be composed of the most powerful muonโneutrino beam and two detectors: a near detector (ND) located at Fermilab and a far detector (FD) 1300 km apart at the Sanford Underground Research Facility (SURF). The chosen baseline and a 40โkt fiducial liquid argon mass will...
The Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kiloton multi-purpose liquid scintillator (LS) detector located in South China. With detector construction complete in late 2024, JUNO is currently taking data during the liquid scintillator filling phase, and the operation with full liquid scintillator is expected in the second half of 2025.
JUNOโs primary goal is to determine the...
Hyper-Kamiokande is a next-generation underground water Cherenkov detector currently under construction in Japan. Thanks to a fiducial volume more than eight times larger than that of the currently operating Super-Kamiokande, and enhanced detection capabilities, Hyper-Kamiokande is expected to significantly surpass the sensitivities of its predecessors, Super-Kamiokande and T2K.
The project...
Long baseline neutrino oscillation experiments have a high sensitivity to the CP violation phase of the neutrino mixing matrix through the ฮฝฮผ โ ฮฝe and ฮฝฬฮผ โ ฮฝฬe appearance channels. For instance, the measurements of the T2K experiment in Japan, using Super-Kamiokande as a far detector, favour a close to maximal CP violation and excluded the CP conserving values at a 90% CL. However, these...
Over the past decades, anomalies in short-baseline neutrino oscillation experiments triggered rich experimental programs to investigate the existence of light sterile neutrinos as a primary explanation. Amongst these, the so-called reactor antineutrino anomaly has played a major role since 2011. It consisted in an alleged deficit of electron antineutrinos emitted by nuclear reactors and...
A meticulous determination of $\Delta m^2_{31}$ and $\theta_{23}$ is indispensable for accurately evaluating the Earth's matter effect in long-baseline experiments, a key element in resolving the neutrino mass ordering conundrum and in measuring the CP phase in the $3\nu$ paradigm. By reviewing the footprints of previous and ongoing experiments and considering the anticipated sensitivities...
The next generation of neutrino experiments aims to provide high-precision measurements of the neutrino oscillation parameters in order to reveal the major unknowns in neutrino physics. Among them, validating the three-neutrino flavor paradigm while testing the non-unitarity of the neutrino mixing matrix remains one of the most exciting, as it allows the exploration of new physics scenarios....
SNO+ is a large multi-purpose neutrino detector located 2 km underground at SNOLAB, Canada, currently in operation filled with 780 tonnes of liquid scintillator as its target mass.ย The high light yield, low background levels, and continually increasing livetime, allow the SNO+ collaboration to perform measurements of solar neutrinos, antineutrinos from reactors and the Earth, and searches for...
There are still many open questions in understanding the nature of neutrinos, the most abundant matter particles in the Universe. Experimental neutrino physics is focused on measuring neutrino properties, such as absolute mass scale, the nature of neutrinos (Majorana or Dirac), and the possible violation of symmetries such as charge-parity and lepton-number conservation.
Neutrinoless...
Neutrinoless double-beta decay (0ฮฝฮฒฮฒ) is a key process to address some of the major outstanding issues in particle physics, such as the lepton number conservation and the Majorana nature of the neutrino. Several efforts have taken place in the last decades in order to reach higher and higher sensitivity on its half-life. The next-generation of experiments aims at covering the Inverted-Ordering...
In this talk, I will discuss the impact of NME uncertainties on the upper limit of the effective neutrino mass in the light neutrino mechanism, where the contribution of the short range contact term is also considered. In this scenario, the potential to discriminate different NME models with the help of future neutrino-less double beta decay experiments will also discussed. On the other hand,...
MicroBooNE is a liquid argon time projection chamber (LArTPC) neutrino detector located along the Fermilab Booster Neutrino Beam and 8 degrees off-axis to the Neutrinos at the Main Injector beam. MicroBooNE collected data from both beams accumulating a large neutrino-argon scattering dataset with a mean neutrino energy of approximately 0.8 GeV. Understanding neutrino-argon interactions is...
โDSNBโ stands for Diffuse Supernova Neutrino Background, i.e. the continuous flux of neutrinos and antineutrinos emitted by all core-collapse supernovae (CCSNe) that have occurred in the observable universe. This elusive signal has yet to be observed and, with an estimated rate of ~1 Hz of CCSNe in the universe, it bears information on e.g. the explosion mechanism of supernovae, intrinsic...
We calculate several types of commutators associated with the leptonic Yukawa coupling matrices in the canonical seesaw mechanism, which can be used to measure leptonic CP violation in both heavy Majorana neutrino decays and light Majorana neutrino oscillations in the flavor basis. The corresponding Jarlskog-like invariants of CP violation and their small non-unitarity effects are derived...
The Deep Underground Neutrino Experiment (DUNE) is a next generation neutrino oscillation experiment which will target the main outstanding questions of neutrino physics, including the neutrino mass ordering and the possibility of CP violation in the lepton sector. It will make use of a suite of 4x17kt large liquid argon (LAr) time projection chambers, located 1.5 km deep underground at SURF,...
The Short-Baseline Near Detector (SBND) is one of the Liquid Argon Time Projection Chamber (LArTPC) neutrino detectors positioned along the axis of the Booster Neutrino Beam (BNB) at Fermilab, and is the near detector in the Short-Baseline Neutrino (SBN) Program. The detector completed commissioning and began taking neutrino data in the summer of 2024. SBND is characterized by superb imaging...
The ICARUS Collaboration is now entering its fifth year of continuing operations of the 760-ton liquid argon T600 detector. The T600 was overhauled at CERN after operations at the LNGS underground laboratory in Italy and moved to its present location at FNAL - as part of the Short-Baseline Neutrino (SBN) program - where it successfully completed its commissioning phase in June 2022. At FNAL...
MicroBooNE is an 85-tonne active mass liquid argon time projection chamber (LArTPC) at Fermilab. The detector, which has an excellent calorimetric, spatial and energy resolution, has collected beam data from two different beamlines between 2015 and 2020, as well as cosmic ray data when no neutrino beam was running. These characteristics make MicroBooNE a powerful detector not just to explore...
The measurement of CP-violation in the leptonic sector offers an opportunity to probe the physics beyond the Standard Model. Currently this measurement can be achieved by the accelerator long-baseline neutrino experiments like T2K, where the differences between neutrino and antineutrino oscillations are investigated. The oscillation probabilities are measured by comparing the neutrino spectra...
Neutrinoless double beta decay (0$\nu\beta\beta$) is a rare process which could take place if neutrinos are Majorana fermions. Its discovery would not only shed light on the nature of neutrinos, but would also provide unambiguous evidence for the existence of new Physics Beyond the Standard Model, as it entails a two unit lepton number violation.
The LEGEND Experiment (Large Enriched...
T2K is a long-baseline experiment measuring neutrino and antineutrino oscillations by observing the disappearance of muon neutrinos, as well as the appearance of electron neutrinos, over a long 295km distance. The ND280 near detector at J-PARC plays a crucial role to minimise the systematic uncertainties related to the neutrino flux and neutrino-nucleus cross-sections as it measures the...
LEGEND-1000 is a next-generation experiment designed to search for the neutrinoless double-beta (0ฮฝฮฒฮฒ) decay. The observation of 0ฮฝฮฒฮฒ decay of $^{76}$Ge isotope would establish the Majorana nature of neutrinos, providing insight into the mechanism of neutrino mass generation and the matter-antimatter asymmetry of the universe.
To achieve an unprecedented discovery sensitivity to 0ฮฝฮฒฮฒ...
ESSnuSB is a design study for a long-baseline neutrino experiment to precisely measure the CP violation in the lepton sector at the second neutrino oscillation maximum, using a beam driven by the uniquely powerful ESS linear accelerator. The ESSnuSBplus design study programme, which is an extension phase of the ESSnuSB project, aims in designing two new facilities, a Low Energy nuSTORM and a...
Neutrino tagging is a new experimental approach for accelerator based neutrino experiments. The method consists in associating a neutrino interaction with the meson decay (i.e. $\pi^\pm\to\mu^\pm \nu_\mu$ or $K^\pm\to\mu^\pm \nu_\mu$) in which the neutrino was originally produced. The properties of the neutrino can then be estimated kinematically from the decay incoming and outgoing charged...
The limited knowledge on neutrino cross-sections at the GeV scale will represent the main source of systematic uncertainty for the next-generation generation neutrino oscillation experiments. Building on the ideas and R\&D efforts of ENUBET and NuTag, SBN@CERN is a proposal for a high-precision neutrino cross-section experiment.
The experiment is driven by slow extracted proton beam enabling...
The Neutrinos from Stored Muons, nuSTORM, facility has been designed to provide intense neutrino beams with well-defined flavour composition and energy spectra. By using neutrinos from the decay of muons confined within a storage ring, a beam composed of equal fluxes of electron- and muon-neutrinos can be created for which the energy spectrum can be calculated precisely. The case for the...
The CLOUD collaboration is pioneering the first fundamental research reactor antineutrino experiment using the novel LiquidO technology for event-wise antimatter tagging. CLOUDโs program is a potential byproduct of the AntiMatter-OTech EIC/UKRI-funded project focusing on industrial reactor innovation. The experimental setup is envisioned to be an up to 10 tonne detector, filled with an opaque...
